The NASA ESTO funded Multislit Optimized Spectrometer (MOS) Instrument Incubator Program advances a spatial multiplexing spectrometer for coastal ocean remote sensing from laboratory demonstration to flight-like environment testing. The multiple slit design reduces the required telescope aperture leading to mass and volume reductions over conventional spectrometers when applied to the GEO-CAPE oceans mission. This paper discusses the performance and characterization of the MOS instrument from laboratory and thermal vacuum testing. It also presents the current technology readiness level and possible future applications. Results of an ocean color data product simulation study using flight-like performance data from MOS are also covered. The MOS instrument implementation for GEO-CAPE provides system benefits that may lead to measurable cost savings and reductions in risks while meeting its science objectives.
The NASA ESTO funded Multi-slit Optimized Spectrometer (MOS) Instrument Incubator Program will advance a spatial multiplexing spectrometer for coastal ocean remote sensing from lab demonstration to flight like environment testing. Vibration testing to meet the GEVS requirements for a geostationary orbit launch will be performed. The multiple slit design reduces the required telescope aperture leading to mass and volume reductions over conventional spectrometers when applied to the GEO-CAPE oceans mission. The MOS program is entering year 3 of the 3-year program where assembly and test activities will demonstrate the performance of the MOS concept. This paper discusses the instrument design, fabrication and assembly. It outlines the test plan to realize a technology readiness level of 6. Testing focuses on characterizing radiometric impacts of the multiple slit images multiplexed onto a common focal plane, and assesses the resulting uncertainties imparted to the ocean color data products. The MOS instrument implementation for GEO-CAPE provides system benefits that can lead to cost savings and risk reduction while meeting the science objectives of understanding the dynamic coastal ocean environment.
The National Research Council’s recommended NASA Geostationary Coastal and Air Pollution Events (GEO-CAPE)
science mission’s purpose is to identify “human versus natural sources of aerosols and ozone precursors, track air
pollution transport, and study the dynamics of coastal ecosystems, river plumes and tidal fronts.” To achieve these goals
two imaging spectrometers are planned, one optimized for atmospheric science and the other for ocean science. The
NASA Earth Science Technology Office (ESTO) awarded the Multislit Optimized Spectrometer (MOS) Instrument
Incubator Program (IIP) to advance a unique dispersive spectrometer concept in support of the GEO-CAPE ocean
science mission. MOS is a spatial multiplexing imaging spectrometer that simultaneously generates hyperspectral data
cubes from multiple ground locations enabling a smaller sensor with faster revisit times compared to traditional
concepts. This paper outlines the science, motivation, requirements, goals, and status of the MOS program.